Police said Friday they have arrested a 53-year-old man in Honjo, Saitama Prefecture, for fraudulently collecting his dead mother’s pension for over three years.

According to police, the man, who has been named as Kanji Takeuchi, was arrested on a separate charge on June 8, at which time police realized his mother was not living at the property as records indicated. Fuji TV reported that an investigation was carried out, during which Takeuchi’s mother’s remains were found encased in concrete in the bathroom of the house they had shared.

Police quoted Takeuchi as saying that he had hidden his mother’s body three years ago after she died of natural causes, so that he could continue to fraudulently collect and live off of her pension. Police estimate that Takeuchi had received about 1.9 million yen in payments since her death.